FreeBSD on Amazon AWS EC2 long standing performance problems
nonesuch at longcount.org
Fri Feb 5 23:35:13 UTC 2021
> On Feb 5, 2021, at 6:14 PM, Sean Chittenden <seanc at freebsd.org> wrote:
> To be clear, this is a known issue that needs attention: it is not a
> benchmarking setup problem. Network throughput has a similar problem and
> needs similar attention. Cloud is not a fringe server workload. -sc
>> On Fri, Feb 5, 2021 at 3:00 PM Jin Guojun[VFF] <jguojun at gmail.com> wrote:
>>> On 2021-02-05 12:45, Gunther Schadow wrote:
>>> Gordon Bergling wrote:
>>>> Can you verify your feelings by numbers?
>>> Yes, like I said
>>>>> Not by a few % points, but by factors if not an order of magnitude!
>>> Do this:
>>> dd if=/dev/zero of=/dev/nvd2 bs=100M status=progress
>>> and you see that it's writing with the "whopping" speed of 70 MB/s.
>>> That used to be good, but it is no longer good. Compare Amazon Linux
>>> the same thing at 300 MB/s.
>>> Now, when you put a file system over it, zfs or ufs, then instantly the
>>> performance gets better:
>>> newfs /dev/nvd2
>>> mount /dev/nvd2 /mnt
>>> dd if=/dev/zero of=/mnt/test bs=100M status=progress
>>> now that works at about 250 MB/s. Decent. So, problem solved?
>> It is not clear if this compares Apple to Apple.
>> What disk drives and CPUs are on FreeBSD, and what are disk drive(s) and
>> CPU(s) on AWS?
>> Knowing the drive brand and models will tell approximately the disk
>> throughput. Agree, 70MB/s is slow for modern disks, but your information
>> does not provide clue why this could be slow.
>> Can this setup get 250MB/s on FreeBSD 11.4? or 300MB/s with Ubuntu 16.04
>> on the same hardware?
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So silly question ; how does FreeBSD work on Google gcp, Microsoft Azure , Digital Ocean?
Do they all suffer the same issue or is this just an Amazon issue ?
Also just a bit of advice; Contrary to popular belief Amazon does not actually sell magic beans .
Mark Saad | nonesuch at longcount.org
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